What protocol does org-mode use for syncing with mobile devices, can it be adapted to use WebDAV?

An open ecosystem of human-signal-capture apps will improve security of the future, i.e. events that have not yet happened. The past is already well monitored and recorded. See "The Adjustment Bureau" for exploration of the topic.

If apps use a mature sync protocol (e.g. WebDAV, CalDAV), they can collectively debug interoperability and cross-platform issues related to that protocol, leaving them free to innovate on UX for mass or vertical audiences. Some examples:

http://www.2doapp.com - CalDAV - iOS, Android and Mac

https://www.omnigroup.com/omnifocus - WebDAV - iOS and Mac

http://www.notebooksapp.com - WebDAV - iOS, Mac, Win